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Question number: 4

Question

A piece of metal weight 40 gm in air, when it is immersed in the liquid of specific gravity 1.24 at 27 °C it weighs 25 gm. When the temperature of liquid is raised to 42°C the metal piece weighs 20gm, specific gravity of the liquid at 42°C is 1.20, then the linear expansion of the metal will be

Choices

Choice (4)

Response

a.

2.6 × 10 -3 / o C

b.

8.3 × 10 -3 /°C

c.

3.316 × 10 -2 /°C

d.

Question does not provide sufficient data or is vague

Question number: 5

Question

The real coefficient of volume expansion of glycerin is 0.000597 per °C and linear coefficient of expansion of glass is 0.000009 per °C. Then the apparent volume coefficient of expansion of glycerin is

Choices

Choice (4)

Response

a.

0.00027 per °C

b.

0.00057 per °C

c.

0.000558 per °C

d.

0.00066 per °C

Question number: 6

Question

2 kg of ice at - 20°C is mixed with 5 kg of water at 20°C in an insulating vessel having a negligible heat capacity. Calculate the final mass of water remaining in the container. It is given that the specific heats of water and ice are 1 kcal/kg/°C and 0.5 kcal/kg/°C while the latent heat of fusion of ice is 80 kcal/kg

Choices

Choice (4)

Response

a.

4 kg

b.

7 kg

c.

2kg

d.

6 kg

Question number: 7

Question

The coefficient of volumetric expansion of mercury is 18 × 10 -5 / o C. A thermometer bulb has a volume 10-6 m 3 and cross section of stem is 0.006 cm 2. Assuming that bulb is filled with mercury at 0°C then the length of the mercury column at 100°C is